Miriam Webster is even further from "collectively defined" than Wikipedia is.

Great, now also link me to a cacophony of Twitter activists who've defined it the same way, I am proven wrong.

But, and of course it's a silly request, can you provide any objective large-scale studies as to who (their demographics) is being canceled, for what categorization, and the net effect of their cancellation? It doesn't matter, granted, because the Wikipedia definition of highly politicized terms is, of course, what counts.